A Pt/TiO2 Nanotube Array Electrode for Glucose Detection and Its Photoelectrocatalysis Self-Cleaning Ability
A Pt/TiO2 Nanotube Array Electrode for Glucose Detection and Its Photoelectrocatalysis Self-Cleaning Ability
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葡萄糖检测用Pt/TiO2纳米管阵列电极及其光电催化自清洁能力
DOI：
10.1149/2.0921702jes
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发表时间：
2017
影响因子：
3.9
通讯作者：
Zhong Shian
中科院分区：
文献类型：
--
作者：
Chen Jian;Kang Yuan;Li Can;Chen Hui;Sun Lei;Wang Yan;Zhong Shian
基于Pt修饰的TiO 2纳米管阵列（NTA）制备了非酶电流型葡萄糖传感器。采用阳极氧化法制备了TiO 2 NTA，并通过离子交换法将Pt纳米粒子负载到TiO 2 NTA上.所制备的电极在非常低的电位下表现出1.01386× 10− 4 A mM− 1 cm− 2的良好灵敏度，在信噪比为3时的检测限为0.2 mM葡萄糖。对葡萄糖的电催化氧化机理进行了探讨，发现葡萄糖的电催化氧化是一个双电子分解反应。结果表明，该电极具有良好的自清洁能力，在被污染后可以恢复并稳定使用。进一步探索了自清洁过程的细节，并且污染的电极被证明能够在波长为365 nm的2.8 mW/cm 2的光强度下在从-0.7 V到1 V的50个循环伏安法之后自清洁。研究结果为Pt/TiO 2 NTA电极检测葡萄糖提供了新的思路，并为利用光电催化自清洁技术更新电极表面提供了新的途径。
A non-enzymatic amperometric glucose sensor was prepared based on Pt-decorated TiO 2 nanotube array (NTA). TiO 2 NTA was obtained through anodization, and Pt nanoparticles were loaded onto the TiO 2 NTA by ion exchange. The prepared electrode exhibited a decent sensitivity of 1.01386× 10− 4 A mM− 1 cm− 2 at a very low potential and a detection limit of 0.2 mM glucose at a signal-to-noise ratio of 3. The mechanism of glucose electrocatalytic oxidation was also examined and a two-electronic decomposition reaction was observed. It was found that the electrode possessed outstanding self-cleaning ability such that it can be restored and used stably after being contaminated. Details of the self-cleaning process were further explored, and the polluted electrode proved to be able to clean itself after 50 cycles of cyclic voltammetry from–0.7 V to 1 V at 2.8 mW/cm 2 light intensity at wavelength of 365 nm. The research results shed new light on glucose detection with Pt/TiO 2 NTA electrode and provide a new way to renew the electrode surface by photoelectrocatalysis self-cleaning.
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